DD28系列單相電能表DD28seriessinglephasewatt-hoursmeter用途Application: DD28型單相電度表系感應單相交流有功電度表，適用于頻率為50Hz，單相交流電網(wǎng)中有功電能的計量。具有體積小、結構設計緊湊、低功耗等特點，其技術指標完全符合GB/T15283-1994國家標準及IEC521國際標準。 DD28single-phasewatt-hourmeterisakindofinductionmeter.whichisapplicabletomeasuretheratedfrequency50Hzandpowerlossinelectrifiedwirenetting.AlltechnicaltargetsarecompletelyconformedtoNationalstandardGB/T15283-1994andlntermationalstandardIEC521.結構特點Structurefeature: 該儀表采用分離式鐵芯結構，軸承具有單寶石、雙寶石、磁推式、磁懸式四種結構，外殼采用鋁、塑料和玻璃三種，基架由優(yōu)質鋁合金壓鑄而成，具有良好的機械強度。Themeterhasseparableelectromagnetandthebearinghasfourkinds;single-jewel,magneticthrustandmagneticfloating.Thecasehasthreekinds;aluminum,plasticandglass.Thedie-castingframeisalloyaluminumwithexcellentmechanicalstrength.主要技術參數(shù)maintechnicaldata:型號Type:DD282 DD283 精度（級）Accurocy(class):2額定電壓Ratedvoltage(v):220-240額定電流Ratedcurrent(A):DD282:2(4),2.5(5),3(6),5(10),10(20),20(40),30(60),40(80)DD283:2(6),3(9),5(15),10(30),15(45),20(60),30(90)過載能力Overl0adcapaciaty:200％Ib 300％Ib 絕緣性能Insulationcurrent:工頻交流電壓2kV歷時1分鐘，沖擊電壓強6kVACvoltage2kVfor1minuteimpulsevoltage6kV外型：DD28透明塑殼；DD28黑色塑殼；DD28玻璃殼；DD28鋁殼